FAIR VALUE MEASUREMENTS (Details Textuals) - USD ($) $ in Thousands	Apr. 30, 2020	Oct. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities	$ 18,993	$ 18,326
Flight Support Group [Member] | FY2019 Acquisition [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	6,400
Total liabilities	1,200
Electronic Technologies Group [Member] | FY 2017 Acquisition [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	20,000
Total liabilities	17,800
Aggregate LCP Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Related liabilities of deferred compensation plans, specified as other long-term liabilities	$ 156,300	$ 151,100